On this day, April 17th, 1973, which major U.S. corporation began operations?

On this day, April 17th, in 1973, Federal Express began overnight operations. The original Federal Express fleet included fourteen aircraft that serviced 25 major cities U.S. cities with overnight and 2 day shipping options. [ Federal Express took on the marketing slogan, "the frieght service company with 550-mile-per-hour delivery trucks ]